add_library(BigInt BigInt.cc)                                                                                                                                                                               
                                                                                                                                                                                                                                                                                                                                                                     
target_include_directories(BigInt INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}")                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                                                                            
                                                                                                                                                                                                                                    
                                                    
